xiaomi-sm8450/android_kernel_xiaomi_sm8450
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

drm/i915/gvt: vGPU interrupt virtualization.

Browse Source 
This patch introduces vGPU interrupt emulation framework.

The vGPU intrerrupt emulation framework is an event-based interrupt
emulation framework. It's responsible for emulating GEN hardware interrupts
during emulating other HW behaviour.

It consists several components:

- Descriptions of interrupt register bit
- Upper level <-> lower level interrupt mapping
- GEN HW IER/IMR/IIR register emulation routines
- Event-based interrupt propagation interface

When a GVT-g component wants to inject an interrupt to a VM during a
emulation, first it should specify the event needs to be emulated and the
framework will deal with the rest of emulation:

- Generating related virtual IIR bit according to virtual IER and IMRs,
- Generate related virtual upper level virtual IIR bit accodring to the
per-platform interrupt mapping
- Injecting a MSI to VM

Signed-off-by: Zhi Wang <zhi.a.wang@intel.com>
Signed-off-by: Zhenyu Wang <zhenyuw@linux.intel.com>
This commit is contained in:
Zhi Wang
2015-09-17 09:22:08 +08:00
committed by Zhenyu Wang
parent 3f728236c5
commit c8fe6a6811
8 changed files with 998 additions and 6 deletions
Download Patch File Download Diff File Expand all files Collapse all files

10
drivers/gpu/drm/i915/gvt/gvt.c
View File

@@ -97,9 +97,10 @@ static void init_device_info(struct intel_gvt *gvt)
if (IS_BROADWELL(gvt->dev_priv) || IS_SKYLAKE(gvt->dev_priv)) {
info->max_support_vgpus = 8;
info->mmio_size = 2 * 1024 * 1024;
info->cfg_space_size = 256;
info->mmio_size = 2 * 1024 * 1024;
info->mmio_bar = 0;
info->msi_cap_offset = IS_SKYLAKE(gvt->dev_priv) ? 0xac : 0x90;
}
}
@@ -118,6 +119,7 @@ void intel_gvt_clean_device(struct drm_i915_private *dev_priv)
if (WARN_ON(!gvt->initialized))
return;
intel_gvt_clean_irq(gvt);
intel_gvt_clean_mmio_info(gvt);
intel_gvt_free_firmware(gvt);
@@ -165,10 +167,16 @@ int intel_gvt_init_device(struct drm_i915_private *dev_priv)
if (ret)
goto out_clean_mmio_info;
ret = intel_gvt_init_irq(gvt);
if (ret)
goto out_free_firmware;
gvt_dbg_core("gvt device creation is done\n");
gvt->initialized = true;
return 0;
out_free_firmware:
intel_gvt_free_firmware(gvt);
out_clean_mmio_info:
intel_gvt_clean_mmio_info(gvt);
return ret;